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dt-bindings: mfd: LMU: Add ti,brightness-resolution 

Add ti,brightness-resolution to the TI LMU binding to define
whether the device uses 8-bit brightness or 11-bit brightness.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Dan Murphy 2019-05-06 14:16:10 -05:00 committed by Jacek Anaszewski
parent 2f230f3004
commit d0147554d0
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/mfd/ti-lmu.txt
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@ -31,6 +31,16 @@ Optional properties:
- ramp-down-us: Current ramping from one brightness level to
the a lower brightness level.
Range from 2048 us - 117.44 s
- ti,brightness-resolution - This determines whether to use 8 bit brightness
mode or 11 bit brightness mode. If this value is
not set the device is defaulted to the preferred
8bit brightness mode per 7.3.4.1 of the data
sheet. This setting can either be in the parent
node or as part of the LED child nodes. This
is determined by the part itself if the strings
have a common brightness register or individual
brightness registers.
The values are 255 (8bit) or 2047 (11bit).
Required node:
- backlight: All LMU devices have backlight child nodes.
@ -217,6 +227,7 @@ lm3697@36 {
compatible = "ti,lm3697-backlight";
lcd {
ti,brightness-resolution = <255>;
led-sources = <0 1 2>;
ramp-up-us = <200000>;
ramp-down-us = <200000>;